Journal ArticleDOI
Residual stress. Part 1 – Measurement techniques
TLDR
In this paper, the effect of residual stresses on fatigue lifetimes and structural integrity are first summarised, followed by the definition and measurement of residual stress, which are characterised according to the characteristic length scale over which they self-equilibrate.Abstract:
Residual stress is that which remains in a body that is stationary and at equilibrium with its surroundings. It can be very detrimental to the performance of a material or the life of a component. Alternatively, beneficial residual stresses can be introduced deliberately. Residual stresses are more difficult to predict than the in-service stresses on which they superimpose. For this reason, it is important to have reliable methods for the measurement of these stresses and to understand the level of information they can provide. In this paper, which is the first part of a two part overview, the effect of residual stresses on fatigue lifetimes and structural integrity are first summarised, followed by the definition and measurement of residual stresses. Different types of stress are characterised according to the characteristic length scale over which they self-equilibrate. By comparing this length to the gauge volume of each technique, the capability of a range of techniques is assessed. In the sec...read more
Citations
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Journal ArticleDOI
Thermo-mechanically coupled constitutive equations for soft elastomers with arbitrary initial states
Weiting Chen,Ya-Pu Zhao +1 more
TL;DR: In this article , a general framework for deriving constitutive equations for soft elastomers with arbitrary initial states is established, which is based on a new proposed intrinsic embedding method of initial states, in which an additive decomposition of material strains is employed and the material coordinates can be properly defined.
Journal ArticleDOI
A Method to Combine Residual Stress Measurements from XRD and IHD using Series Expansion
T. C. Smit,R.G. Reid +1 more
TL;DR: In this article, the authors proposed a method to constrain the residual stress distributions obtained through series expansion by using X-ray diffraction (XRD) measurements, thereby obtaining full depth stress measurements with reduced uncertainty near the surface.
Journal ArticleDOI
Small punch creep testing of thermally sprayed Stellite 6 coating: A comparative study of as-received vs post-heat treatment
TL;DR: In this article, the microstructure and creep behaviour of a HVOF Stellite 6 coating was investigated in the as-sprayed condition and after an isothermal heat-treatment of 1'h at 1050'°C.
Journal ArticleDOI
Microstructural characterization of laser surface-melted Inconel 718
TL;DR: A detailed study of the effect of laser parameters on microstructure and phases of the laser surface-melted (using 2kW continuous wave Yb-fibre laser) Inconel 718 has been carried out.
Journal ArticleDOI
Crack removal behavior in ultra-precision machining of sapphire
TL;DR: In this paper, the authors investigated the material response during overlapping machining operation and whether existing surface cracks can be removed by taking advantage of the anisotropy of sapphire.
References
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Book
Elements of X-ray diffraction
TL;DR: In this article, the authors present a chemical analysis of X-ray diffraction by Xray Spectrometry and phase-diagram Determination of single crystal structures and phase diagrams.
Book
Encyclopedia of Materials: Science and Technology
K. H. Jürgen Buschow,Robert W. Cahn,Merton C. Flemings,Bernhard Ilschner,Edward J. Kramer,Subhash Mahajan +5 more
TL;DR: In this article, the fundamental core theory of functional properties and properties of materials are discussed. But the authors focus on the physical properties of thin films and artificial multilayers, rather than the structural properties of the materials themselves.
Journal ArticleDOI
Residual stress. Part 2 – Nature and origins
TL;DR: In this paper, the authors examine the nature and origins of residual stresses across a range of scales, from the long range residual stress fields in engineering components and welded structures, through the interphase stresses present in composites and coatings, to the microscale interactions of phase transformations with local stresses.
Book
Handbook of Measurement of Residual Stresses
TL;DR: In this paper, the authors describe a sequence of residual stress measurements made to determine a Handbook on Stiffness & Damping in Mechanical Design, which can be used to compare different methods of measuring residual stress.